CN101950861A - Active control system of 65m radio telescope primary reflecting surface - Google Patents
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Abstract
The invention relates to an active control system of a 65m radio telescope primary reflecting surface. The active control system is characterized in that the primary reflecting surface of a radio telescope is a combined type primary reflecting surface formed by splitting a plurality of subpanels, wherein each subpanel is connected with a plurality of displacement actuators, and drivers of all the displacement actuators are respectively connected with a main control machine. The connection manner is as follows: the main surface of the 65m radio telescope is divided into eight sections in which all the displacement actuators are used as a control group; each control group is provided with a section controller; and servers of each section controller are respectively connected with the main control machine. Based on the technique of active control of a large-scale optics astronomical telescope, the invention develops the totally new structure and a control technique of a radio astronomical telescope control system. The active control system can meet more complex and precise technical requirement of the 65m radio telescope on the control system.
Description
Technical field
The present invention relates to a kind of control system, be specifically related to a kind of ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces.The present invention is the grant of national natural science foundation key project, " heavy caliber active optics submillimeter wave/millimetric-wave telescope scheme and key technology research ", and approval number is: 10833004.
Background technology
Radio astronomy is the principle that is similar to radar, the astronomical observation means that grow up, but it just receives the radio wave of celestial body, and its main tool is a radio astronomical telescope.The primary reflection surface of radio astronomical telescope is a paraboloidal antenna for radio astronomy, this primary reflection surface when receiving the radio signal of celestial body in order to focus on radio signal.The primary reflection surface of antenna for radio astronomy all is to be fixedly mounted on the back of the body frame in the prior art, can do orientation and elevating movement during the observation celestial body.But the parabolic shape of primary reflection surface itself is changeless.But along with development of modern science and technology, radio astronomical telescope is made bigger and bigger, and the diameter of its primary reflection surface is also increasing.The primary reflection surface diameter of the Shanghai radio telescope of for example, developing reaches 65 meters.The astronomer is not content with traditional radio telescope, expand the application in the astronomical observation field; Must become passive panel and be the active panel; This is the new technology in the radio telescope; It has proposed a new difficult problem to the structure of radio telescope primary reflection surface.Structure and its displacement control of making big so parabolic primary reflection surface can run into a lot of difficulties.This structural requirement bigger, the telescopic system that upgrades is complicated more, and required precision is higher.Lack the answer that addresses these problems in the prior art.
In the traditional optical astronomical observation technology near the field of radio astronomy, a kind of active optics astronomical telescope technology has appearred, and telescopical in other words ACTIVE CONTROL system is the new technology of modern astronomical observation.The appearance of this technology is the technical difficulty for the large-scale astronomical telescope that solves the construction super large caliber, and adopts the sub-mirror of polylith to be spliced into large-scale astronomical telescope; The sub-mirror of in the splicing construction each is action simultaneously under control system is handled, and can form the deformation of whole minute surface, reaches the needs of astronomical observation, promptly constitutes the active optics astronomical telescope.The technological difficulties of the large-scale active optics astronomical telescope of this splicing construction are control system: it need satisfy all sub-mirrors and receive instruction simultaneously, Dong Zuo specification requirement simultaneously, also include displacement action and deformation action in the action, it is huge needing the factor quantity of control, also will satisfy the control precision of milli newton level simultaneously.The control system of large-scale astronomical telescope (TCS) is the system of a complexity, includes pointing of the telescope and tracking control system, force actuator control system, displacement actuator control system and dome control system etc.By force actuator control system and displacement actuator system, can overcome thin mirror surface spliced telescope minute surface error, telescopical picture element is improved, make the construction of large-scale astronomical telescope become possibility.Da Tian district area multiple target fiber spectrum astronomical telescope (hereinafter to be referred as LAMOST) is spliced into Schmidt corrector MA and 37 sub-mirrors of hexagon by 24 sub-mirrors of hexagon respectively and is spliced into primary mirror sphere MB and forms.Each piece mirror of MA and MB is respectively by three displacement of cover displacement actuator control minute surface, totally 183 covers.34 cover force actuators are housed, totally 816 covers under the every sub-mirror of MA.The sub-mirror of large-scale astronomical telescope can expand to thousands of, and displacement control and sub-mirror Deformation control is concentrated in the same control system finish simultaneously.Bring the quantity of controlling object to reach unprecedented huge degree thus, this has proposed great challenge to telescope control system.
For example, the control system of the active optics electric-control system in Zhong Guo the national big science engineering LAMOST telescope.LAMOST telescope active optics system adopts the power transducer as the feedback device that adds the closed-loop control of (drawing) power; The method of soft or hard combination is carried out the control thought of logical combination, and the centralized network control scheme that distributes is the method for very successful a kind of innovation.
This system has realized that every sub-mirror of MA controls 34 cover force actuators operations, totally 24 sub-mirrors 816 cover force actuators operations simultaneously.Accomplished that afterburning scope is ± 150N, computer has reached 5/10000ths to the closed-loop control precision of force actuator, root-mean-square value≤50mN.RMS≤30mN accounts for 98.367%, all is better than the technical indicator of force actuator.This system can be by the aspheric surface of 24 MA mirrors of the real-time control break of the controlled parameter of local area network (LAN).
By local area network (LAN) control simultaneously MA and MB primary mirror 816 cover force actuators and 183 cover displacement actuators totally 999 cover actuator real time executions satisfy the specification requirement of LAMOST telescope active optics control system fully; And control precision is far superior to every technical indicator.
And for example: No. 01113668.5 application for a patent for invention of China discloses a kind of mirror shift control system for large astronomical telescope.Its structure is, the astronomical telescope minute surface is spliced by some hexagonal sub-mirrors, the micrometric displacement actuator is placed at the back side of each piece mirror and microbit is put transducer, the output that microbit is put transducer is connected to computer, the output of computer connects each actuator, form closed-loop control system, it is characterized in that, connect master controller by host computer, master controller connects several displacement controllers respectively, each displacement controller connects the driver of several displacement actuators respectively, and each driver connects a displacement actuator.This patent disclosure active optics telescope and traditional telescopical different structure.
Summary of the invention
The ACTIVE CONTROL system that the purpose of this invention is to provide a kind of 65 meter radio telescope primary reflection surfaces, this ACTIVE CONTROL system become the primary reflection surface of radio telescope passive type to be active primary reflection surface; Simultaneously, can satisfy of the more complicated and more high-precision specification requirement of 65 meter radio telescopes to control system.
Finishing above goal of the invention scheme is, a kind of ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces, it is characterized in that, the primary reflection surface of radio telescope (is called for short: interarea) adopt the composite type primary reflection surface that is spliced by some sub-panels, every sub-panel wherein is connected with some displacement actuators, the driver of all displacement actuators connects with main control computer (or claim the master control computer, or deserve to be called the bit machine system) respectively, and its connected mode is:
The interarea of 65 meter radio telescopes is divided into 8 sectors, and all displacement actuators in each sector are as a control group; Each control group is provided with a sector controller;
The server of each sector controller is connected with main control computer respectively.
Above-described main control computer (or claim the master control computer, or deserve to be called the bit machine system) be the main control computer of radio telescope primary reflection surface.This main control computer is connected with the astronomical observation computer.During work, the astronomical observation computer is to this main control computer issuing command.The needed various parameters of astronomical observation that main control computer provides according to the astronomical observation computer, the action of control radio telescope primary reflection surface is to reach the parameter that observation needs.
The present invention is in the field of radio astronomical telescope, uses for reference the technology of active optics in the optics astronomical telescope field, a novel concept of proposition: active surface template radio astronomical telescope.
Radio telescope is different with the operational mode of optical telescope; Radio telescope is a radio wave of accepting celestial body; Its principal reflection panel is similar to a radar antenna; And optical telescope LAMOST observes at visible light wave range; Its principal reflection panel is similar to an optical lens.The interarea displacement accuracy of radio telescope is lower than the LAMOST optical telescope, but its stroke is greater than the LAMOST optical telescope; The actuator of its load capacity in the LAMOST telescope surpasses an order of magnitude; The quantity of its displacement actuator is also much larger than the LAMOST optical telescope.This is the problem that must think over according to the difference of object when the design control system.
More particularly, the concrete structure of the ACTIVE CONTROL system of primary reflection surface of the present invention is:
The topological structure of ACTIVE CONTROL 1104 cover displacement actuators
(1), interarea is divided into the topological structure of 8 sectors
The interarea of 65 meter radio telescopes is divided into 8 sectors, as the interface of Fig. 2 and computer, shown in the actuator composition system control topology diagram.
(2), the topological structure of a sector
The technical indicator of active panel actuator, shown in table 1.1:
Table 1.1 65 meter radio telescope antennas are the design objective of panel actuator initiatively
Antenna interarea system is the initiatively abbreviation of Adjustment System of antenna main reflector Board position.Owing to install to wait and have error, and large-scale antenna also will be subjected to the influence of factors such as gravity, temperature and wind, certainly exist error between actual curved surface that aerial panel is formed during work and the desirable curved surface, so for the efficient that improves Shanghai 65 meter radio telescope antenna surfaces the observed efficiency of high frequency band (particularly), the major function of antenna active panel system is exactly the variation according to aerial position in the observation, aerial panel is carried out real-time adjustment, thereby guarantee the precision of required aerial panel.
Active panel system configuration scheme
1, the automatically controlled requirement of actuator
Instruction according to control system moves back and forth, and has the position auto-lock function, to reduce the consumption of the energy.The key technical indexes of actuator is referring to table 1.1.
The major parameter of actuator microcontroller is:
(1), repetitive positioning accuracy＜0.015mm;
(2), closed-loop control mechanism: be provided with closed-loop control mechanism in the actuator microcontroller;
(3), communication means: be provided with the communication means of carrying out communication with the master control computer in the actuator microcontroller;
(4), active panel controlled function;
A, can calculate the compensation rate at each control point in real time;
B, the microcontroller by bus and each actuator carry out communication;
C, can graphically show each control point state;
D, can carry out each actuator of manual adjustments by active surface panel control system main control computer;
E, can carry out data interaction with the antenna main control computer.
2, the Electro Magnetic Compatibility of active surface control system
Active surface control system and element thereof must reach GB/T17618-1998 Information Technology Equipment immunity to interference limit value and the requirement of method of measurement CISPR24 (97) B level.
3, actuator control system conceptual design
Control system of the present invention can be accomplished: 1104 cover displacement actuators have carried out detection and the demarcation after the connection control system one by one.30 millimeters of the strokes of 1104 cover displacement actuators, repetitive positioning accuracy satisfy the specification requirement of 65 meter radio telescopes less than 15 μ.
Under outdoor natural environment, carry out life test, after energising control actuator has moved 2 months continuously, do not have and damage, can operate as normal.Control stroke: 30mm, repeatable accuracy is less than 3 μ.
The control of the displacement actuator in 65 meter radio telescopes, on technical indicator: stroke is 30mm; Resolution is 0.015mm.
4, the control structure of actuator
As shown in Figure 1, suppose have N intelligent controller by the link of K multiplex communication controller after, accept the real-time control of M the displacement actuator of order realization of actuator master control controller.
5, actuator master control computer
Actuator master control computer is placed in the control room of 65 meter radio telescopes; Adopt Industrial Control Computer.This master controller is connected with the computer of astronomical observation, accepts the computer commands of astronomical observation, resolves the back to actuator controller transmitting control commands; Return the state information of execution after the actuator controller fill order, give actuator master control computer.
6, actuator controller
(1) intelligent controller
At present can be with reference to the structure of the intelligent controller in the LAMOST telescope active optics system.
Intelligent controller is directly installed on the telescopical truss; And three anti-processing have been adopted.The actuator control experiment of under lab doing in 65 meter radio telescopes is a science.Improve by experiment, just can be installed on the back of the body frame of panel back of 65 meter radio telescopes.
(2) structure of actuator controller
1. embedded type CPU mainboard
Mainboard in the actuator intelligent controller: the PC104 master controller is that independently the embedded type CPU mainboard has RS232/485 communication and ethernet communication interface as control and treatment, can directly connect CRT, keyboard, mouse or the like.In the control of reality, only use 485 communication interfaces to connect master controller as intelligent controller.The embedded type CPU master board, the RAM of 256M deposits start-up routine and intelligent control program with the CF card.
Motor is installed in the control box, actuator and being integral of design of Controller.So both made things convenient on panel and installed, also strengthened anti-jamming capacity and, weakened simultaneously electromagnetism to external radiation etc.
2. the connected mode of actuator
The motor of displacement actuator is installed in the control box; Control box externally has only netting twine to be connected by aviation plug with supply lines.(make in batches and adopt Ethernet+CAN bus structures, one group of CAN bus connects N platform actuator controller to computer by Ethernet; N=69 for example, promptly 16 NET/CAN/ protocol conversion controllers just can be realized network service) operation of control actuator.
3. DC～DC power conversion connecting plate
It is that a very little plate is installed in the actuator control box, and the DC power supply that power source is delivered to intelligent controller by cable connects on the DC-DC, and then is transformed into the inner needed various DC power supply of actuator controller.
4. circuit such as the feedback of actuator and logic control
The feedback of actuator adopts the encoder of 256 lines to be directly installed on the axle of stepping motor, and the counter of encoder adopts 24 forward-backward counter.8 I/O on this circuit board, have been designed as the spacing input of control step motor and actuator etc.The design of this plate is directly on the plate that is inserted in Node Controller; Reduced the connection of line.Reliability and anti-jamming capacity have been improved.
Actuator master control computer sends and the data that receive N platform actuator controller and the transmission of order by NET/CAN/ protocol conversion controller.That is to say the true control 1104 cover actuator real-time operations of actuator master computer.
The ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces disclosed by the invention, used for reference large-scale optics astronomical telescope technology of active control, develop the brand new technical that radio astronomical telescope control, ACTIVE CONTROL of the present invention system can satisfy the more complicated and more high-precision specification requirement of 65 meter radio telescopes to control system.
Can accomplish: MA1104 cover actuator has carried out by detection and demarcation after the cover connection control system.Accomplish that by demarcation the range of operation of every suit actuator, precision satisfy the specification requirement of 65 meter radio telescope projects, and be far superior to technical indicator.
Description of drawings
Fig. 1 is an actuator control system structure chart;
Fig. 2 is divided into the topology diagram of 8 sectors for interarea;
Fig. 3 is that a sector actuator is formed system topology figure;
Fig. 4 is network topology structure figure;
Fig. 5 is actuator controller internal junction figure;
Fig. 6, Fig. 7, Fig. 8 are axial tension test displacement resolution test curve figure;
Fig. 9, the test of Figure 10 axial tension are displacement accuracy detection curve figure;
Figure 11, Figure 12 are axial compressive force test displacement resolution test curve figure;
Figure 13, Figure 14 are axial compressive force test displacement accuracy detection curve figure;
Figure 15～Figure 18 is side direction pulling force 150kg test curve figure.
Embodiment
The interarea of 65 meter radio telescopes is divided into 8 sectors, and all displacement actuators in each sector are as a control group; Each control group is provided with a sector controller;
The server of each sector controller is connected with main control computer respectively.
Wherein, the structure of single cover displacement actuator is seen Fig. 5: this figure is the cover cut-away view in the 1104 cover displacement actuators.It is to be made of motor, encoder, embedded type CPU, stepper motor driver, DC/DC and position transducer.
Stepping motor
Table 5 stepping motor major parameter
| Motor model, producer | Customization |
| Operating temperature range | -25-+65℃? |
| Supply power voltage, electric current | 2.52V/2.8A? |
| Power consumption during the single motor operate as normal | 7.056W? |
| Power consumption under the single motor battery saving mode | 3.5W? |
| The moment of torsion of motor | Static torque 110N.CM |
| Motor revolution screw mandrel lifting amount | 0.3675 μ/step; 0.147mm/ change |
| The stepping motor step angle | 1.8±5％°/STEP? |
| Encoder line number | 256 (4 segmentations 1024) |
Controllor for step-by-step motor
Table 6 controllor for step-by-step motor parameter
| Model, producer | Customization/HIPROS converges emerging rich industry |
| Operating frequency | 100HZ-1KHZ is adjustable |
| The type of embedded OS, working method | Directly assembler language programming |
| The program downloading mode | CAN? |
Illustrate that controllor for step-by-step motor embeds the fault-tolerant design of program, program safety design
Communication
1) with the interface of computer, topological structure and wiring diagram after 1104 actuator composition systems are seen Fig. 1;
2) connection and power line wiring and the quarantine measures in actuator, external interface figure.See Fig. 2, Fig. 3;
3) multichannel hub or repeater number and arrangement; See Fig. 4 and table 7
Table 7 communications parameter
| Communication modes | Fiber optic Ethernet/CAN |
| Communication speed | Gigabit/1-2 million |
| The communication interface waterproof measure | Connect in the fiber optic Ethernet control cabinet/CAN waterproof aviation plug |
| The communication interface shielding measure | CAN double shield twisted-pair feeder |
| Multichannel hub or repeater number | 24 mouthfuls of optical fiber switch, 16 fiber optic Ethernet/CAN protocol converters |
| The communication cable total length | Optical fiber: to control cabinet distance/CAN about 1500 meters from the control room |
| The communication cable total weight | About 300KG |
| The response time of 1100 actuators of control | 100ms---1s? |
7, power supply
1) the supply power mode block diagram of 1100 actuators, power consumption: 20KW
2) total length of service cable, weight
The total length of service cable: 10000M
Weight: 1000KG
8, the EMC design is considered
The anti-surge design of power supply;
The CAN bus communication adopts the twisted-pair feeder double shield;
Ethernet communication adopts optical fiber cable;
The low-voltage power supply cable adopts shielded type cable overcoat bellows;
Threading in the steel pipe, shielded type cable are adopted in the alternating current 220V power supply;
Control box adopts almag, built-in sheet metal shielding;
Stepping motor adopts low voltage control;
The actuator controller housing connect the earth less than
The outer shell joint the earth of control cabinet less than
The Wiring technique specialized designs.
9, main control computer software display message
The display message of 1104 actuators:
The A real-time position information,
The positive and negative mechanical position limitation of B,
The positive negative electricity of C is spacing.
10, the automatic measuring ability of master controller:
A.1104 " 0 " place value of an actuator detects;
B.1104 the positive and negative mechanical position limitation of an actuator detects;
C.1104 the spacing detection of positive negative electricity of an actuator;
D.1104 the detection and localization of actuator.
11, test experience
Do single displacement actuator prototype experiment earlier, use the two-frequency laser interferometer test that experimentizes, whether analyzing test data satisfies specification requirement, the stability and the reliability of test actuator control circuit, the problem that research exists and the improved method of exploration.Then, 5 covers are tested the actuator that satisfies index request and be installed in the actual motion detection of carrying out one month on the Shanghai She Shan observatory experiment frame.
Single actuator test platform and condition:
(1) constant temperature, constant humidity Clean Operating Lab;
(2) German JENAer ZLM800 two-frequency laser interferometer, wherein optics is all produced by ZEISS;
(3) Labview7.1 of America NI company software suite;
(4) virtual instrument hardware kit: digital multimeter, oscilloscope, signal generator, motion controller, data acquisition card;
(5) afterburning equipment: special-purpose crossbeam lever force-adding device, counterweight weight that the brachium ratio makes that an end applies is set amplifies 12 and extraordinarily be loaded on the actuator, can be implemented in draw, pressure and side loading apply function;
(6) on the special overturn platform, carry out active surface plate and actuator translocation.
Test job thes contents are as follows:
The simulation actuator carries the environment of snow load to actuator at real work condition lower panel, support and wind, mainly carries out the test of three directions in this test, is respectively:
(1) axial tension test, test load is respectively 150kg, 300kg.Under this working condition, carry out resolution test, the test of creeping, accuracy test respectively (as Fig. 6～Fig. 8);
(2) axial compressive force test, test load is respectively 150kg, 300kg.Under this working condition, carry out resolution test, the test of creeping, accuracy test (as Fig. 9, Figure 10) respectively;
(3) side force test, test load is 150kg.Under this working condition, carry out resolution test, the test of creeping, accuracy test (as Figure 11, Figure 12);
(4) no load test: carry out the backlash journey test under the idle condition;
(5) specifically test and record entry are detailed carries out according to 65 meters actuator test outlines.
(6) test result is taken passages
Axial tension 300kg test
1) displacement resolution test
See Figure 13, Figure 14.
2) displacement accuracy detects
See Figure 15,16.
3) the displacement accuracy detection side is tested to pulling force 150kg
Displacement resolution/the test of creeping:
See Figure 17,18.
Claims (6)
1. the ACTIVE CONTROL system of a meter radio telescope primary reflection surface, it is characterized in that, the primary reflection surface of radio telescope adopts the composite type primary reflection surface that is spliced by some sub-panels, every sub-panel wherein is connected with some displacement actuators, the driver of all displacement actuators is connected with main control computer respectively, and its connected mode is:
The interarea of 65 meter radio telescopes is divided into 8 sectors, and all displacement actuators in each sector are as a control group; Each control group is provided with a sector controller;
The server of each sector controller is connected with main control computer respectively.
2. the ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces according to claim 1 is characterized in that, described main control computer is connected with the astronomical observation computer.
3. the ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces according to claim 1 is characterized in that, wherein,
The major parameter of actuator microcontroller is:
(1), repetitive positioning accuracy＜0.015mm;
(2), closed-loop control mechanism: be provided with closed-loop control mechanism in the actuator microcontroller;
(3), communication means: be provided with the communication means of carrying out communication with the master control computer in the actuator microcontroller.
4. the ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces according to claim 1, it is characterized in that active surface control system and element thereof must reach GB/T17618-1998 Information Technology Equipment immunity to interference limit value and the requirement of method of measurement CISPR24 (97) B level.
5. according to the ACTIVE CONTROL system of the described 65 meter radio telescope primary reflection surfaces of one of claim 1～4, it is characterized in that wherein, the structure of the microcontroller of actuator is:
1. embedded type CPU mainboard:
Mainboard in the actuator intelligent controller: the PC104 master controller is that independently the embedded type CPU mainboard has RS232/485 communication and ethernet communication interface as control and treatment, directly connects CRT, keyboard, mouse; In control, only use with 485 communication interfaces connection master controller as intelligent controller; The embedded type CPU master board, the RAM of 256M deposits start-up routine and intelligent control program with the CF card;
2. the connected mode of actuator:
The motor of displacement actuator is installed in the control box; Control box externally has only netting twine to be connected by aviation plug with supply lines; Computer is by the operation of Ethernet control actuator controller;
3. DC～DC power conversion connecting plate:
Be that a very little plate is installed in the actuator control box, the DC power supply that power source is delivered to intelligent controller by cable connects on the DC-DC, and then is transformed into the inner needed various DC power supply of actuator controller;
4. the feedback of actuator and logic control circuit:
The feedback of actuator adopts the encoder of 256 lines to be directly installed on the axle of stepping motor, and the counter of encoder adopts 24 forward-backward counter; 8 I/O of design are as the spacing input of control step motor and actuator on this circuit board; The design of this plate is directly on the plate that is inserted in Node Controller.
6. the ACTIVE CONTROL system of 65 meter radio telescope primary reflection surfaces according to claim 5 is characterized in that, the stroke of described displacement actuator is 30 millimeters, and repetitive positioning accuracy is less than 15 μ.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520678A (en) * | 2011-11-04 | 2012-06-27 | 中国科学院国家天文台南京天文光学技术研究所 | Remote control system for active reflection panel of radio telescope |
| CN104913904A (en) * | 2015-05-19 | 2015-09-16 | 中国科学院国家天文台 | Telescope fault early warning method and system |
| CN105827312A (en) * | 2016-04-28 | 2016-08-03 | 中国科学院国家天文台南京天文光学技术研究所 | Visible light communication method controlled by active reflector of radio astronomy-telescope and device thereof |
| CN109341631A (en) * | 2018-11-14 | 2019-02-15 | 中国科学院国家天文台 | A kind of telescope reflecting surface automatic calibration method |
| CN112350077A (en) * | 2020-09-29 | 2021-02-09 | 北京理工大学 | Ultra-large-diameter planar reflection array antenna |
| RU2822678C1 (en) * | 2023-09-13 | 2024-07-11 | Алексей Петрович Сайкин | Radio telescope with bowl on aerostatic suspension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676655A2 (en) * | 1990-08-15 | 1995-10-11 | Mitsubishi Denki Kabushiki Kaisha | Reflector with passive temperature compensation |
| CN1343897A (en) * | 2001-06-05 | 2002-04-10 | 中国科学院国家天文台南京天文光学技术研究所 | Mirror shift control system for large astronomical telescope |
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2010
- 2010-03-05 CN CN201010118547.3A patent/CN101950861B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676655A2 (en) * | 1990-08-15 | 1995-10-11 | Mitsubishi Denki Kabushiki Kaisha | Reflector with passive temperature compensation |
| CN1343897A (en) * | 2001-06-05 | 2002-04-10 | 中国科学院国家天文台南京天文光学技术研究所 | Mirror shift control system for large astronomical telescope |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520678A (en) * | 2011-11-04 | 2012-06-27 | 中国科学院国家天文台南京天文光学技术研究所 | Remote control system for active reflection panel of radio telescope |
| CN104913904A (en) * | 2015-05-19 | 2015-09-16 | 中国科学院国家天文台 | Telescope fault early warning method and system |
| CN105827312A (en) * | 2016-04-28 | 2016-08-03 | 中国科学院国家天文台南京天文光学技术研究所 | Visible light communication method controlled by active reflector of radio astronomy-telescope and device thereof |
| CN109341631A (en) * | 2018-11-14 | 2019-02-15 | 中国科学院国家天文台 | A kind of telescope reflecting surface automatic calibration method |
| CN109341631B (en) * | 2018-11-14 | 2020-05-26 | 中国科学院国家天文台 | Automatic calibration method for telescope reflecting surface |
| CN112350077A (en) * | 2020-09-29 | 2021-02-09 | 北京理工大学 | Ultra-large-diameter planar reflection array antenna |
| RU2822678C1 (en) * | 2023-09-13 | 2024-07-11 | Алексей Петрович Сайкин | Radio telescope with bowl on aerostatic suspension |
| RU2827308C1 (en) * | 2023-10-23 | 2024-09-24 | Алексей Петрович Сайкин | Radio telescope with bowl on aerodynamic suspension |
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